Anna Jackson's plane ride to the Florida Keys was just one of two firsts the 19-year-old experienced in August.

The former Greenbrier High School student boarded the flight to the southernmost tip of Florida to film a science-fiction horror film about a a two-headed shark.

"It's been a whirlwind ever since," she said. "It was exhilarating."

2 Headed Shark Attack, an Asylum film, begins with college students, enrolled in a Semester at Sea program, who get deserted when their ship is sunk by a two-headed shark. Featured in the film are Charlie O'Connell, Carmen Electra and Brooke Hogan.

"We were on the ocean on a boat the majority of the time," she said. "It was gorgeous."

Jackson plays Hailey, a "good girl" who "keeps everybody in line."

The film is scheduled for release Jan. 17.

Jackson's audition took place via the Internet. She got the role, and the following day was on the next flight to Florida.

Jackson, who attended Greenbrier until 2009, started homeschooling as a junior to further her modeling career.

By January 2010, she had signed a modeling contract with BMG Models.

With no prior acting training, Jackson said acting is a different experience than modeling.

"With modeling, you have to be so aware of all your movements ... but acting is completely different," she said. "After the first few days, I was OK, but it was definitely different."

Jackson spent about three weeks in Florida filming the movie and described her co-stars as nice and down-to-earth.

Since the end of August, Jackson has been back at her Grovetown home relaxing, spending time with friends and family and working out at the gym to stay in shape.

Though it may be stressful, Jackson said she loves the pressures that come with being a model.

"Ever since I can remember, I wanted to do this," she said.

Lucy Jackson said her daughter has always been a natural at modeling.

"Everyone used to always come up to her all the time and ask if she were a model," said Lucy Jackson, a former model.

Jackson's work has led her to walking the runway at fashion shows in Florida and Alabama, but she hopes to do more modeling in front of the camera in the future.

When her acting and modeling days are over, Jackson can see herself going to college and studying to become a sports broadcaster or criminal prosecutor, she said.

Jackson is eager to soon leave home and get the chance to go to Milan, Italy, for fashion week.

"I don't know how much longer I'll be here," she said. "So when you are here, every moment has to count."

Lucy Jackson said her daughter knows the door at her house is always open.